讨论数列an^2+bn+2/n+1的极限

讨论数列an^2+bn+2/n+1的极限
讨论数列an^2+bn+2/n+1的极限

讨论数列an^2+bn+2/n+1的极限
an^2+bn+2/n+1=(an^3+(a+b)n^2+bn+2)/(n+1)
当a≠0或a+b≠0,极限为∞,只有当a=0且b=0时才有极限为0